CA2700672A1 - A wheelchair with suspension arms for wheels - Google Patents

A wheelchair with suspension arms for wheels Download PDF

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Publication number
CA2700672A1
CA2700672A1 CA2700672A CA2700672A CA2700672A1 CA 2700672 A1 CA2700672 A1 CA 2700672A1 CA 2700672 A CA2700672 A CA 2700672A CA 2700672 A CA2700672 A CA 2700672A CA 2700672 A1 CA2700672 A1 CA 2700672A1
Authority
CA
Canada
Prior art keywords
wheelchair
wheel
suspension arm
castor
motorised
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2700672A
Other languages
French (fr)
Other versions
CA2700672C (en
Inventor
Horst Bergstrasse Lindenkamp
Jens Borgweg Farwer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Invacare International SARL
Original Assignee
Invacare International Sarl
Horst Bergstrasse Lindenkamp
Jens Borgweg Farwer
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Invacare International Sarl, Horst Bergstrasse Lindenkamp, Jens Borgweg Farwer filed Critical Invacare International Sarl
Publication of CA2700672A1 publication Critical patent/CA2700672A1/en
Application granted granted Critical
Publication of CA2700672C publication Critical patent/CA2700672C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • A61G5/041—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven having a specific drive-type
    • A61G5/045—Rear wheel drive
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1078—Parts, details or accessories with shock absorbers or other suspension arrangements between wheels and frame
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
    • A61G2203/14—Joysticks

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Vehicle Body Suspensions (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Automatic Cycles, And Cycles In General (AREA)

Abstract

Each wheel (10, 14 / 20, 24) of the wheelchair (1) is fixed to a suspension arm (11,15 / 21, 25). A force transmitting device, for example a spring and damper of the wheelchair unit, directly connects two suspension arms situated on the same side of the wheeled conveyance, so that forces exerted on one of the wheels are transmitted to the other wheel. In this way, obstacles can more conveniently be overcome. A further advantage of the wheelchair is that it can be easily upscaled and driving properties can be adjusted according to a user's preferences.

Claims (16)

1. A wheelchair having a left and a right side, with at least two wheels, a motorised wheel and a castor wheel (10, 14 / 20, 24) on each of said left and right sides, wherein each of said wheels is rotatably fixed to a respective suspension arm (11, 15 / 21, 25), with each suspension arm being pivotally fixed to a base (13) at a pivot axis (12, 16 / 22, 26), wherein a force transmitting device (18 / 28) directly connects the suspension arm of the castor wheel of one side (14 / 24) with the suspension arm of the motorised wheel of the same side (10 / 20) of the wheelchair.
2. The wheelchair of claim 1, wherein the suspension arms (15, 25) of the castor wheel (14, 24) are oriented towards the front end of the wheelchair and the suspension arms (11, 21) of the motorized wheel (10, 20) towards the rear end of the wheelchair.
3. The wheelchair of claim 1, wherein the pivot axis of the suspension arm of the castor wheel and of the suspension arm of the motorized wheel are pivotally fixed to the base at equal height from a horizontal ground on which the wheelchair is placed.
4. The wheelchair of any one of the preceding claims, wherein an angle between horizontal and the ongitudinal axis of the force transmitting device is in the range of from 0 up to 70°.
5. The wheelchair of any one of the preceding claims, in which the force transmitting device (18, 28) is a spring, a damper, a combined spring and damper unit, or a rigid bar.
6. The wheelchair of any one of the preceding claim s, in which the pivot axis (16 / 26) of the suspension arm (15 / 25) of the castor wheel (14 / 24) is horizontally offset with respect of the pivot axis (12 / 22) of the suspension arm (11 / 21) of the motorised wheel (10 / 20) of the same side.
7. The wheelchair of any one of the preceding claims, in which the pivot axis (12, 16 / 22, 26) of the two suspension arms (11, 15 / 21, 25) on one side of the wheelchair are situated next to each other, both in between the castor and motorised wheels.
8. The wheelchair of any one of the preceding claims, in which the pivot axis of the suspension arms (12, 16 / 22, 26) are situated at the same height or lower than the axis of the castor and/or motorised wheel (14, 10 / 24, 20), with respect to the ground.
9. The wheelchair of any one of the preceding claims, in which the suspension arms of the castor and motorised wheels (15, 11 / 25, 21) on one side of the wheelchair are mechanically connected with each other so that upon upward pivoting of the suspension arm (15 / 25) of the castor wheel (14 / 24) a downward force is exerted by the suspension arm (11 / 21) of the motorised wheel (10 / 20).
10. The wheelchair of any one of the preceding claims, in which the force transmitting device (18 / 28) is attached so that upon pivoting of the suspension arm of the castor wheel, forces are directly and horizontally transmitted to the suspension arm of the motorised wheel.
11. The wheelchair of any one of the preceding claims, comprising a spring and/or damper (19 / 29) fixed with one end to the rear part (32) of the base (13) and with its other end to the rear part of the suspension arm (11 / 21) of the motorised wheel, whereby the spring and/or damper (19 / 29) is arranged so as to vertically transmit and/or absorb forces.
12. The wheelchair of any one of the preceding claims, wherein the suspension arms (15, 25 / 11, 21) of the castor and/or motorised wheels comprise a curved arm (39, 47) extending partly along a substantially parallel circle of the respective wheel (10, 14 / 20, 24) from the respective pivot axis (12, 16 / 22, 26) of the suspension arm to the top of the respective wheel.
13. The wheelchair of any one of the preceding claims, wherein the base (13) comprises a substantially horizontal loading area for batteries (8), the loading area being situated at a height with respect to the ground, which is equal or lower to the height of the axis (50, 40) of the castor and/or motorised wheel.
14. The wheelchair of any one of the preceding claims, arranged to be up-and/or downscalable.
15. The wheelchair of any one of the preceding claims, wherein the size and driving characteristics can be adjusted according to the user's preferences.
16. A method for adjusting the size and driving characteristics of a wheelchair comprising the steps of:
- providing the wheelchair according to any of claims 1 to 15;
- selecting parts of the wheelchair according to the desired size and driving characteristics, the parts being selected from (a) suspension arms and wheels (b) the force transmitting device, (c) other parts of the wheelchair, and (d) combinations of any of the former; and - constituting a wheelchair with the selected parts, thus adjusting the size and driving characteristics of the wheelchair.
CA2700672A 2007-01-12 2008-01-14 A wheelchair with suspension arms for wheels Active CA2700672C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07100483.2 2007-01-12
EP07100483A EP1943995A1 (en) 2007-01-12 2007-01-12 A wheeled conveyance with suspension arms for wheels
PCT/IB2008/050111 WO2008084462A1 (en) 2007-01-12 2008-01-14 A wheelchair with suspension arms for wheels

Publications (2)

Publication Number Publication Date
CA2700672A1 true CA2700672A1 (en) 2008-07-17
CA2700672C CA2700672C (en) 2012-08-28

Family

ID=38110081

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2700672A Active CA2700672C (en) 2007-01-12 2008-01-14 A wheelchair with suspension arms for wheels

Country Status (7)

Country Link
US (1) US8297388B2 (en)
EP (2) EP1943995A1 (en)
AT (1) ATE476167T1 (en)
CA (1) CA2700672C (en)
DE (1) DE602008002049D1 (en)
DK (1) DK2101704T3 (en)
WO (1) WO2008084462A1 (en)

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US7040429B2 (en) 2001-10-10 2006-05-09 Invacare Corporation Wheelchair suspension
US7066290B2 (en) 2001-10-19 2006-06-27 Invacare Corp. Wheelchair suspension having pivotal motor mount
US11213441B2 (en) 2002-10-25 2022-01-04 Invacare Corporation Suspension for wheeled vehicles
US7293801B2 (en) 2003-08-18 2007-11-13 Invacare Corporation Self-stabilizing suspension for wheeled vehicles
EP1943995A1 (en) 2007-01-12 2008-07-16 Invacare International Sàrl A wheeled conveyance with suspension arms for wheels
DK2277490T3 (en) 2007-02-08 2015-04-13 Invacare Corp Wheelchair suspension
US8910975B2 (en) 2007-02-14 2014-12-16 Invacare Corporation Wheelchair with suspension
CA2775916C (en) 2009-10-09 2015-02-03 Invacare Corporation Wheelchair suspension
CA2780273C (en) * 2009-11-15 2015-04-28 Invacare Corporation Wheelchair
KR101055473B1 (en) * 2009-12-15 2011-08-08 삼성전기주식회사 Carrier member for substrate manufacturing and method for manufacturing substrate using same
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US8919797B2 (en) 2010-03-16 2014-12-30 Invacare Corp. Wheelchair seat assembly
US8931583B2 (en) 2010-06-24 2015-01-13 Invacare Corporation Wheelchair
US9308143B2 (en) 2012-02-15 2016-04-12 Invacare Corporation Wheelchair suspension
US20150053490A1 (en) * 2013-08-25 2015-02-26 Amy Green Santagata Battery powered all terrain wheelchair
CA2933695C (en) 2013-12-16 2024-01-16 Stephen J. Antonishak Elevated height wheelchair
US10052247B2 (en) 2015-08-24 2018-08-21 Dream Roller Mobility, LLC Wheelchair with four wheel independent suspension and modular seating
AU2017224130B2 (en) 2016-02-27 2020-03-05 Pride Mobility Products Corporation Adjustable height wheelchair
US10772774B2 (en) 2016-08-10 2020-09-15 Max Mobility, Llc Self-balancing wheelchair
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ATE476167T1 (en) 2010-08-15
US20100102529A1 (en) 2010-04-29

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